Tow roll



G. DOWNING 'Dec. 11, 1956 TOW ROLL Filed May 7, 1954 United StatesPatent TOW ROLL George Downing, Parkersburg, W. Va., assignor toAmerican Viscose Corporation, Philadelphia, Pa., a corporation ofDelaware Application May 7, 1954, Serial No. 428,272

7 Claims. (Cl. 203355) This invention relates to yarn-treating apparatusand, more particularly, to a roll for the processing of tow comprised oftextile strands and filaments.

In the processing of yarn strands and filaments and especially suchfilaments in the form of tow, it is customary to pass the tow overcorrugated rolls which ordinarily have a lead clad or coated surface.Such a protective surface is necessary due to the corrosive nature ofthe liquids used in the treating process. It has been found thatcorrugated rolls having merely a lead surface wear very quickly, whichin turn requires frequent interruption for replacement, cleaning, etc.Due to the build-up of sulphur adjacent the tow track over the roll,considerable damage to filaments is frequently caused.

A primary object of the present invention is to overcome the abovedisadvantages by providing a corrugated roll which is simple tomanufacture and which greatly increases the life of lead covered towrolls of the type described.

A further object of the invention is to provide a corrugated tow rollhaving an especially hard, long-wearing and smooth surface which willnot be affected by yarn-treating liquids.

A further object of the invention is to provide a corrugated tow rollhaving a plurality of glass elements embedded in the surface thereof toprovide the corrugations.

Further objects will be apparent from the specification and drawings inwhich:

Figure 1 is a side view partly broken away of an improved tow rollconstructed in accordance with the present invention;

Figure 2 is a section as seen at II-II of Figure 1;

Figure 3 is an enlarged fragmentary sectional view of the periphery ofthe roll shown 1n Figure 2;

Figure 4 is a view similar to Figure 3 showing a modified manner ofsecuring the glass rods in the surface of the roll;

Figure 5 shows a further modification with regard to the rod securingmeans; and

Figure 6 is an end view of the structure of Figure 5.

The invention comprises essentially the provision of a roll having alead surface which is grooved to receive a plurality of glass elements,preferably rods, secured across the face of the roll parallel to theaxis thereof. In one form of the invention, the rods are secured in thesurface of the lead by means of a swaging or rolling action to expandthe lead partially around the periphery of the rods. In another form, anadhesive, either with or without a cushion, may be employed to hold therods in the lead surface; and in a third form the rods are retained bymeans of threaded plugs which compress the individual glass elementsbetween opposite axially spaced lead rims on the roll.

Referring more particularly to the drawings, a corrugated roll,constructed in accordance with the present invention, comprises a pairof stub shafts 10 and 11, either of which may be supplied with drivingmeans (not shown) in accordance with conventional practice. Theconstruction of each end of the roll is the same so that it isconsidered necessary to describe only the left-hand end shown sectionedin Figure l. The stub shaft 11 is welded to a flange 12 which is boltedto an inner flange 13 by means of cap screws 14, 14 extending throughthe end plate 15. Flange 13 is welded to end plate 15 so that the stubshaft and flange 12 may be removed when desired. The roll shell 16 iswelded to the end plates 15 around the periphery of the roll as shownclearly in Figure 5. The periphery of the shell 16, as well as theoutside of the end plates, is covered with a lead coating 17, which onthe shell 16 is of substantial thickness.

In the preferred embodiment, I cut a plurality of parallel grooves inthe coating 17 in a planer or other suitable machine. These grooves areof proper size and shape to accommodate a plurality of glass elements18, 18 which extend above the surface of the lead coating 17 slightlyless than It will be understood that the cross-sectional shape of theglass elements may be round, square or any other desired configurationwhich may lend itself to satisfactory locking in the lead. However, Ihave found that inexpensive glass rods of circular cross-section performvery satisfactorily when they are embedded slightly more than 180 in thegrooves. The grooves in the lead coating are conveniently formed bysetting up the roll in a planer, either with or without a suitablefixture. After the grooves are cut to the proper depth, the glasselements are installed in the grooves and pressed therein by means of aroller positioned on the planer tool post. Either simultaneously or in asubsequent operation, the rods are anchored by means of a bead rollerlocated to run between adjacent rods and to expand the leadcircumferentially between such adjacent rods as shown at 19, 19 inFigure 3. This operation securely keys the rods into the lead coatingand effectively provides a satisfactory and long-lasting roll.

Figure 4 illustrates an alternate manner of securing the glass elements,such as rods, to the lead periphery of the roll. In this case, leadcoating is likewise cut or scarfed to a shape slightly larger than thatof the glass elements. An adhesive 20, 20, either with or without a thinsheet or strip which serves as a cushion for the glass elements, isutilized in this form to retain the rods in place.

In the form shown in Figure 5, the lead coating on the roll is shaped toprovide annular flanges or rims 25 which extend radially outwardly ateach end of the roll surface. Each rim is suitably drilled and tapped toaccommodate the glass rods or elements 18', and the elements areretained in the rims by means of threaded lead plugs 26, 26. If desired,a gasket 27 may be interposed between the ends of the glass rods and theplugs 26. The construction shown in Figures 5 and 6, although somewhatmore expensive than that shown in Figures 3 and 4, provides considerablygreater length of service and freedom from any possibility that theglass elements may become detached from the surface of the roll.

Having thus described my invention, I claim:

1. A corrugated roll for processing yarn filaments such as tow and thelike comprising a cylindrical member, journal means for said member, alead coating on the periphery of said member, and a plurality ofelongated glass elements anchored in said coating to form axiallyextending corrugations around said periphery.

2. Apparatus in'accordance with claim 1 in which the elements are rodsembedded in the lead coating and in which the coating is expandedpartially around the rods to anchor the rods in the coating.

2,773,588 3 4 3. Apparatus in accordance with claim 1 in which the 7.Apparatus in accordance with claim 1 in which the anchoring meanscomprises an adhesive. lead coating is expanded more than 180circumferential- 47 Apparatus in accordance with claim 1 having a 1y arund the rods. cushion between the coating and the glass elements.

5. Apparatus in accordance with claim 1 in which the 5 References Citedin the file of this Pater!t anchoring means comprises at leastoneannular flange UNITED STATES PATENTS around the periphery of the shell,and a threaded plug 2259 202 Cooper Oct 14 1941 in said flange retainthe glass element 2 597 839 Morrill :IZIIII: May 20' 1952 6. Apparatusin accordance with claim 5 in which the flange is an integral part ofthe lead coating. 1 2628406 Allen 1953

